:root {
    --primary: #4361ee;
    --primary-light: #eef2ff;
    --primary-hover: #3730a3;
    --secondary: #64748b;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --info: #0ea5e9;
    --dark: #1e293b;
    --light: #f8fafc;
    --white: #ffffff;
    --border: #e2e8f0;
    --text-main: #334155;
    --text-muted: #64748b;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --radius: 1rem;
}

body {
    font-family: 'Outfit', sans-serif;
    background-color: #f4f7fe;
    color: var(--text-main);
    margin: 0;
    padding: 0;
}

.card-premium {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

.card-premium:hover {
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.btn-premium {
    background: var(--primary);
    color: white;
    border-radius: 0.75rem;
    padding: 0.75rem 1.5rem;
    font-weight: 600;
    border: none;
    transition: all 0.2s;
}

.btn-premium:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 10px 15px -3px rgba(67, 97, 238, 0.3);
    color: white;
}

/* Sidebar Light & Clean */
.sidebar {
    width: 280px;
    height: 100vh;
    position: fixed;
    left: 0;
    top: 0;
    background: var(--white);
    border-right: 1px solid var(--border);
    padding: 2rem 1.25rem;
    z-index: 1000;
    display: flex;
    flex-direction: column;
}

.sidebar-link {
    display: flex;
    align-items: center;
    padding: 0.85rem 1rem;
    color: var(--text-muted);
    text-decoration: none;
    border-radius: 0.75rem;
    margin-bottom: 0.25rem;
    font-weight: 500;
    transition: all 0.2s;
}

.sidebar-link i {
    width: 20px;
    margin-right: 12px;
    font-size: 1.1rem;
    text-align: center;
}

.sidebar-link:hover {
    background: var(--light);
    color: var(--primary);
}

.sidebar-link.active {
    background: var(--primary-light);
    color: var(--primary);
    font-weight: 600;
}

/* Sidebar Navigation Scroll */
.sidebar nav {
    overflow-y: auto;
    overflow-x: hidden;
    scrollbar-width: thin;
}

.sidebar nav::-webkit-scrollbar {
    width: 4px;
}

.sidebar nav::-webkit-scrollbar-track {
    background: transparent;
}

.sidebar nav::-webkit-scrollbar-thumb {
    background-color: var(--border);
    border-radius: 20px;
}

.main-content {
    margin-left: 280px;
    padding: 2.5rem;
    min-height: 100vh;
}

/* POS Interface Light */
.pos-container {
    display: flex;
    height: calc(100vh - 70px);
}

.pos-products {
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem;
    background: #f4f7fe;
}

.pos-cart {
    width: 420px;
    background: white;
    border-left: 1px solid var(--border);
    display: flex;
    flex-direction: column;
}

.product-card {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: 1rem;
    padding: 1rem;
    text-align: center;
    transition: all 0.2s;
    cursor: pointer;
}

.product-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow);
    transform: translateY(-3px);
}

.price-tag {
    background: var(--primary-light);
    color: var(--primary);
    padding: 0.25rem 0.5rem;
    border-radius: 0.5rem;
    font-weight: 700;
}

@media (max-width: 991.98px) {
    .sidebar {
        left: -280px;
        transition: 0.3s;
    }

    .sidebar.show {
        left: 0;
    }

    .main-content {
        margin-left: 0;
        padding: 1.5rem;
    }
}

.grad-primary {
    background: linear-gradient(135deg, #4361ee 0%, #3a0ca3 100%) !important;
}

.grad-success {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%) !important;
}

.grad-danger {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%) !important;
}

.grad-dark {
    background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%) !important;
}